Denial of service in Allen-Bradley MicroLogix 1400 and Allen-Bradley MicroLogix 1100 - CVE-2017-7901

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Main Vulnerability Database Vulnerabilities #VU6697

Denial of service in Allen-Bradley MicroLogix 1400 and Allen-Bradley MicroLogix 1100 - CVE-2017-7901

Published: May 24, 2017


Vulnerability identifier: #VU6697
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-7901
CWE-ID: CWE-343
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Rockwell Automation
Affected software:
Allen-Bradley MicroLogix 1400
Allen-Bradley MicroLogix 1100

Detailed vulnerability description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to generation of insufficiently random TCP initial sequence numbers. A remote attacker can predict the numbers from previous values and spoof or disrupt TCP connections.

Successful exploitation of the vulnerability may result in denial of service.


How to mitigate CVE-2017-7901

Update to version 21.00

Sources